10:23 a.m.
These callbacks let us to create ploop volumes in directory pools.
If a ploop volume was created via buildVol callback, then this volume
is an empty ploop device with DiskDescriptor.xml.
If the volume was created via .buildFrom - then its content is the
same as input volume.
Ploop volume consists of ploop image file and a corresponding
DiskDescriptor.xml file.
Signed-off-by: Olga Krishtal <okrishtal(a)virtuozzo.com>
---
src/storage/storage_backend.c | 90 ++++++++++++++++++++++++++++++++++++++++
src/storage/storage_backend.h | 8 ++++
src/storage/storage_backend_fs.c | 4 +-
3 files changed, 101 insertions(+), 1 deletion(-)
diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index c07b642..96bd3fc 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -773,6 +773,94 @@ virStorageBackendCreateExecCommand(virStoragePoolObjPtr pool,
return ret;
}
+/* Set up directory for ploop volume. If function fails,
+* volume won't be created.
+*/
+
+static int
+virVolCreateDirForPloop(virStoragePoolObjPtr pool ATTRIBUTE_UNUSED,
+ virStorageVolDefPtr vol)
+{
+ int err;
+ if ((err = virDirCreate(vol->target.path,
+ (vol->target.perms->mode == (mode_t) -1 ?
+ VIR_STORAGE_DEFAULT_VOL_PERM_MODE:
+ vol->target.perms->mode),
+ vol->target.perms->uid,
+ vol->target.perms->gid,
+ 0)) < 0) {
+ return -1;
+ }
+ return 1;
+}
+
+int virStorageBackendCreatePloop(virConnectPtr conn ATTRIBUTE_UNUSED,
+ virStoragePoolObjPtr pool,
+ virStorageVolDefPtr vol,
+ virStorageVolDefPtr inputvol,
+ unsigned int flags)
+{
+ int ret = 0;
+ char *size = NULL;
+ char *path = NULL;
+ virCommandPtr cmd = NULL;
+
+ virCheckFlags(0, -1);
+ if (vol->target.format != VIR_STORAGE_FILE_PLOOP) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unsupported storage vol type %d"),
+ vol->target.format);
+ return -1;
+ }
+ if (inputvol && inputvol->target.format != VIR_STORAGE_FILE_PLOOP) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unsupported input storage vol type %d"),
+ inputvol->target.format);
+ return -1;
+ }
+
+ if (vol->target.encryption != NULL) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ "%s", _("encrypted ploop volumes are not supported
with"));
+ return -1;
+ }
+
+ if (vol->target.backingStore != NULL) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("copy-on-write ploop is not yet supported"));
+ return -1;
+ }
+
+ if (!inputvol) {
+ if (!virVolCreateDirForPloop(pool, vol)) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "%s", _("error creating directory for ploop "
+ "ploop init"));
+ return -1;
+ }
+ if (virAsprintf(&path, "%s/%s", vol->target.path,
"root.hds") < 0)
+ return -1;
+
+ if (virAsprintf(&size, "%lluM", VIR_DIV_UP(vol->target.capacity,
(1024*1024))) < 0) {
+ ret = -1;
+ goto cleanup;
+ }
+
+ cmd = virCommandNewArgList("ploop", "init", "-s",
size, "-t", "ext4", path, NULL);
+ } else {
+ vol->target.capacity = inputvol->target.capacity;
+ cmd = virCommandNewArgList("cp", "-r",
inputvol->target.path, vol->target.path, NULL);
+ }
+ ret = virCommandRun(cmd, NULL);
+
+ cleanup:
+
+ virCommandFree(cmd);
+ VIR_FREE(size);
+ VIR_FREE(path);
+ return ret;
+}
+
enum {
QEMU_IMG_BACKING_FORMAT_NONE = 0,
QEMU_IMG_BACKING_FORMAT_FLAG,
@@ -1293,6 +1381,8 @@ virStorageBackendGetBuildVolFromFunction(virStorageVolDefPtr vol,
if (vol->type == VIR_STORAGE_VOL_BLOCK)
return virStorageBackendCreateBlockFrom;
+ if (vol->type == VIR_STORAGE_VOL_PLOOP)
+ return virStorageBackendCreatePloop;
else
return virStorageBackendCreateRaw;
}
diff --git a/src/storage/storage_backend.h b/src/storage/storage_backend.h
index 20e6079..852d6ed 100644
--- a/src/storage/storage_backend.h
+++ b/src/storage/storage_backend.h
@@ -108,6 +108,14 @@ int virStorageBackendCreateRaw(virConnectPtr conn,
virStorageVolDefPtr vol,
virStorageVolDefPtr inputvol,
unsigned int flags);
+
+int virStorageBackendCreatePloop(virConnectPtr conn,
+ virStoragePoolObjPtr pool,
+ virStorageVolDefPtr vol,
+ virStorageVolDefPtr inputvol,
+ unsigned int flags);
+
+
virStorageBackendBuildVolFrom
virStorageBackendGetBuildVolFromFunction(virStorageVolDefPtr vol,
virStorageVolDefPtr inputvol);
diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 525e45c..3487545 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -1179,7 +1179,9 @@ _virStorageBackendFileSystemVolBuild(virConnectPtr conn,
create_func = virStorageBackendCreateRaw;
} else if (vol->target.format == VIR_STORAGE_FILE_DIR) {
create_func = createFileDir;
- } else if ((tool_type = virStorageBackendFindFSImageTool(NULL)) != -1) {
+ } else if (vol->target.format == VIR_STORAGE_FILE_PLOOP) {
+ create_func = virStorageBackendCreatePloop;
+ }else if ((tool_type = virStorageBackendFindFSImageTool(NULL)) != -1) {
create_func = virStorageBackendFSImageToolTypeToFunc(tool_type);
if (!create_func)
--
1.8.3.1